Swimming in Louisiana in september 2025 Sea temperature by city in september
Do you want to go to the beach in Louisiana in september 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in september in Louisiana by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Louisiana in september 2025
Here, find the average sea temperature in Louisiana in september in several coastal cities.
83°F
min: 79°F / max: 87°F
Cameron
84°F
min: 80°F / max: 88°F
Grand Isle
84°F
min: 80°F / max: 88°F
Holly Beach
84°F
min: 80°F / max: 88°F
Houma
84°F
min: 80°F / max: 88°F
Lake Charles
84°F
min: 80°F / max: 88°F
Morgan City
84°F
min: 80°F / max: 88°F
Pecan Island
84°F
min: 79°F / max: 88°F
Port Sulphur
84°F
min: 80°F / max: 88°F
Slidell
83°F
min: 79°F / max: 87°F
Where should you go swimming in Louisiana in the month of september?
Swimming in Louisiana in september is ideal
In september in Louisiana swimming conditions are generally the same everywhere.
In september in New Orleans, Cameron, Grand Isle, Holly Beach, Houma, Lake Charles, Morgan City, Pecan Island, Port Sulphur and Slidell, swimming conditions are perfect! With water reaching a maximum of 87°F and an average of 83°F, going in the water (and staying there!) feels great.
Where to go swimming in Louisiana in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
New Orleans
| September | |||
| Average sea temperature | 83°F | ||
| Minimum sea temperature | 79°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 77°F | ||
| Precipitation | 5.1in | ||
| Number of days of precipitation | 10 jour(s) (32%) | ||
| Cloud cover | 27% | ||
| Our opinion | ideal swimming |
More information on swimming in New Orleans in september
Cameron
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 80°F | ||
| Maximum sea temperature | 88°F | ||
| Average outside temperature | 81°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 74°F | ||
| Precipitation | 7.2in | ||
| Number of days of precipitation | 9 jour(s) (30%) | ||
| Cloud cover | 30% | ||
| Our opinion | ideal swimming |
Grand Isle
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 80°F | ||
| Maximum sea temperature | 88°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 81°F | ||
| Precipitation | 7in | ||
| Number of days of precipitation | 11 jour(s) (35%) | ||
| Cloud cover | 26% | ||
| Our opinion | ideal swimming |
Holly Beach
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 80°F | ||
| Maximum sea temperature | 88°F | ||
| Average outside temperature | 81°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 74°F | ||
| Precipitation | 7.2in | ||
| Number of days of precipitation | 9 jour(s) (30%) | ||
| Cloud cover | 30% | ||
| Our opinion | ideal swimming |
Houma
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 80°F | ||
| Maximum sea temperature | 88°F | ||
| Average outside temperature | 81°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 76°F | ||
| Precipitation | 5.3in | ||
| Number of days of precipitation | 9 jour(s) (31%) | ||
| Cloud cover | 27% | ||
| Our opinion | ideal swimming |
List of coastal cities in Louisiana
| New Orleans in september | ideal swimming |
| Cameron in september | ideal swimming |
| Grand Isle in september | ideal swimming |
| Holly Beach in september | ideal swimming |
| Houma in september | ideal swimming |
| Lake Charles in september | ideal swimming |
| Morgan City in september | ideal swimming |
| Pecan Island in september | ideal swimming |
| Port Sulphur in september | ideal swimming |
| Slidell in september | ideal swimming |